Today was my 4th outing with the Keltec sub 2k, Gen2, 9mm, glock 17. I `ve put maybe 300 rounds thru it and today in the middle of the magazine I pulled the trigger, and no boom. I racked the charging handle back, extracted the round, slapped it back, and pulled the trigger. BOOM. Pulled it again and nothing. Repeated the process again and it worked. I did notice the trigger pull felt funny the times it did not fire. When one of the rounds that did not fire, I clicked the safety on and then off and then it fired. I did a search on the internet and found that in the past the safety would partially engage because of a loose part, but in these stories the safety button had visibly moved. In my case it is tight and fully on or off with no movement. Anyone else share this experience? I'm not eager to send this off for repair in these current times.